Transcript 幻灯片 1 - Institute of Astronomy, Cambridge

Presentation for Cambridge Delegation
Briefing on NAOC
Gang Zhao
National Astronomical Observatories · CAS
Dec. 3, 2008 · Beijing
Outline
 Structure
of NAOC
 Progress
of Key Projects
- LAMOST
 Some
- FAST
- LUREX
New Projects
- 21CMA
 Developed
- WSO
- Site Survey
International Status
Structure of NAOC
Director General
1
Associate
Director
8
Administration
Department
30
Research
Groups
8
Laboratories
7
Stations
Graduate
Students
Master
Doctor
Changchun
Urumqi
Xinglong(LAMOST)
Miyun HuaiRou
NAOC
Urastai
Delingha
PMO
NIAOT
SHAO
Gaomeigu FAST
YNAO
2005.08.31
7
Structure of NAOC (HQ)
Director General
1
Associate
Director
3
Administration
Department
27
Research
Groups
92
Laboratories
143
Academic
Commission
31
Stations
and
Facilities
67
Graduate
Students
Master 92
Doctor 114
Service
Personnel
5
Progress of Key Projects

LAMOST (Large sky Area Multi-Object fiber
Spectroscopic Telescope )

FAST (Five-hundred-meter Aperture Spherical
Telescope )

LUREX (Lunar Resource Explorer : Chang’E)
Status and Progress of LAMOST
– adopts the active optics technique as well as
the parallel controllable fiber positioning system.
– a unique astronomical instrument in combining a
large clear aperture and wide field of view.
– 2007-2008:
» Optic (Ma 24 + Mb 37)
» Instruments (4000 fibers, 16 spectrographs,
32 CCDs)
Status and Progress of LAMOST








Technical advantages:
large clear aperture ( 4m, segmented mirrors)
wide field of view ( 5 degree)
multi-object spectroscopic survey (4000 objects with
one exposure)
Scientific goals:
extragalactic observation
structure and evolution of the Galaxy
multi-wave identification.
Key event:
- Small system finished in June, 2007
1/4 optic, 1/16 fibers
- Observing while
constructing
- Finished in
August, 2007
Status and Progress of LAMOST
April 2008
June 2008
Status and Progress of FAST
 Unique Karst depression as the site
 Active main reflector
 Cable - parallel robot feed support
Status and Progress of FAST
Optical geometry and Specs









Reflector：R～300m, D～500m,
opening angle:θ～110-120°
Illuminated aperture: Deff=300m
Sky coverage：maximum zenith
angle: 40°
Working frequencies：
70MHz-3GHz, up to C-, Xband
Sensitivity 2000 ㎡/K
Resolution 2.9’
Multibeam 19
Pointing Accuracy：8″
★ S1
★ S2
O
Miyun Model
HI detection on Sep. 6 2006
Official Approval on
FAST Funding Proposal on
Jul. 10 2007 by NDRC
Status and Progress of LUREX



Chang’E Project successfully
launched to survey the moon
in 2007.
NAOC is the leading science
programs of the project.
The science ground segment
is built and to be operating at
NAOC
Status and Progress of LUREX
The scientific goals of LUREX:




To acquire three-dimensional atlas of the Moon’s
surface, and spectra
To investigate abundance and distributions of usable
elements
To survey distribution and thickness of dusty, loose
lunar regolith, in order to estimate potential gas
resource, especially helium
To learn more about space environment near the
Moon
Data downlink stations and data center


A 50-meter and a 40-meter antennas have
been built by NAOC for data downlinks and
VLBI orbit measurement.
Data center is located at NAOC headquarter.
Some New Projects
 21cm
survey (Detection of first light after Big
Bang)
 WSO/UV
(World Space ObservatoryUltraviolet)
 Astronomical
Site Survey in Western China
Status and Progress of 21CMA
June 2006: construction completed
10287 antennas @ 4x6 km arms
Physical area：50544m2 Effective area: 25000 m2
Total cost：3M USD
S
N
W
1 pod=127 antennas
control room
21CMA Layout
81 pods along two perpendicular arms (6km+4km)
E
Baselines: 3240
Freq channels: 4096
Status and Program of 21CMA
Frequency coverage:
50 - 200 MHz
Redshifted 21cm Line:
λ = 21cm (1 + z)
z
λ(cm)
ν(MHz)
6
147
200
10
246
130
20
441
68
FM Radio Sky seen by 21CMA
100 sqr deg around NCP region
baseline=4555.566m res=2.76arcmin
World Space Observatory - Ultraviolet




Wavelength rage:
Ultraviolet 1100—3500Å
Primary mirror diameter
：1.7m
Pointing accuracy:
0.05~0.1”




Lead by Russia, participated
by China, Germany, Italy,
Spain, etc.
Launch: 2012
Operational Life：5years
(10 goals)
Cost 300 M Euro
Operation mode:
international space
observatory
WSO-UV’s Three Science Instruments
Field Camera Unit
(Spain)
High Resolution Double
Echelle Spectrograph
(Germany)
Long Slit Spectrograph
(China)
Evgeny Skripunov
Lavochkin
Association
[email protected]
23
Long Slit Spectrograph Contributed by
China (lead by NAOC)
Parameter
Wavelength
coverage
102~320 nm
two-channel design
Width of
slit
1  82 m
Length of
slit
75  6.2 mm
Spectral
resolution
1500~2500
Spatial
resolution
0.5”~1”
sensitivity
MCP
detectors
specification
Entrant Slits
Holographic
Gratings
Optimized to observe
faint sources
NUV
Channel
FUV
Channel
Astronomical Site Survey in Western China
2003-present, for the next generation ELT, and for mid-sized
telescopes of the Eastern-Asian astronomical union.
Survey Area: Tibet, Xinjiang, Qinghai, Yunnan
Karasu: N38 10.489 E74 48.145, 4500m
Oma: N32 32.665 E83 03.367, 5000m
2007.10 Karasu
40 m CT2 tower
Site Survey: Infrastructure and Monitoring
DIMM seeing
dome
10m tower
weather station
SBIG seeing
monitor
SBIG cloud
monitor
MIR cloud
monitor
Site Survey: Infrastructure and Monitoring
2007.10 Oma
Site
40 m CT2 tower
4.5 m antenna
Satellite communication
DIMM seeing
dome
weather station
10m tower
Developed International Status

Astronomical journals Chinese Journal of Astronomy
and Astrophysics (Research in Astronomy and
Astrophysics in 2009) has become a SCI journal.

The 28th General Assembly of the International
Astronomical Union (IAU/GA) was awarded to China
for the first time, and will be held in 2012. NAOC will
be in charge of organizing. The historical milestone
would undoubtedly promote the international status
and influences of Chinese astronomy, and would also
boost the development of astronomy and astrophysics.
[email protected]